すくsukuなくともnakutomo
1.

A phrase used to indicate the minimum acceptable standard or amount in a situation, emphasizing that something is necessary or required to a certain degree.

2.

A term expressing a baseline expectation, implying that, no matter what else may happen, a certain minimum should be acknowledged or met.

3.

An expression used for setting a lower boundary in estimations or considerations, suggesting the least possible extent that can be counted or recognized in a given context.

Example:

私は、少なくとも10冊の本を持っている。